Vista - Problems with opening emails with new messenger

Hi,

Wondered if anyone could shed some light onto the new WLM for me.

I've installed it fine and its seems to be working ok apart from the fact I can't open my email inbox by clicking on the envelope icon at the top right hand side. It does nothing at all.
Also there is a message coming up saying 'you have 5 invitations' which I assume is people trying to add me as a contact but everytime I click on it, it disappears and then reappears 5 minutes later. No matter how many time I've clicked it, it won't do anything.

Thanks in advance,

Sarah